Heating device



March 31. 1925.

F. F. REISER HEATING DEVICE] Filed May 19, 1922 attorney;

Patented Mar. 31, 1925.

UNITED STATES PAT ENT OFFICE.

HEATING DEVICE.

Application filed May 19, 1922. Serial No. 562,188.

To all whom it may concern:

Be it known that FRED F. Rnrsnn, a citizen of the United States ofAmerica, residing at Bridgewater, in the county of McCook and State ofSouth Dakota, has invented new and useful Improvements in HeatingDevices, of which the following is a specification.

The object of the invention is to provide w a simple and comparativelyinexpensive but eflicient domestic heater combining the advantages ofhot air and hot water heating service and adapted for a wide range ofvariation in dimensions andcapacity to adapt 15 it for economical useunder Widely different conditions; and with this object in view theinvention consists in a construction and combination of parts of which apreferred embodiment is shown in the accompanying go drawings, whereinFigure 1 is a vertical sectional view of a heater embodying theinvention.

Figure 2 is a detail elevational view showing the heating coil per se.

The apparatus includes an outer shell or hot air drum enclosing a firebox 11 from which it is spaced to provide a surrounding air chamber 12having a cold air inlet 13 at the bottom and a hot air outlet 14 at thetop,

30 said fire box having a smoke or draft outlet 15; together with aheating coil 16 having inlet and outlet terminals 17 and 18 with itslower coil resting upon or located substantially in the plane of theupper edge of 85 the fire pot 19.

The coil is of volute form with its convolutions contracted in diameterfrom its base toward the upper end but with the tubing forming the coilincreased in diameter from its inlet toward its outlet end or from thelowermost toward the uppermost convolu- The hot air shell is designed toperform the functions of a direct or pipeless heater "in that it may bearranged in direct communication with an a artment to be heated throughthe agency 0 a registering or grating in the floor of a room directlyover the heater, while the terminals of the coil may be connected bysuitable distributing pipes with radiators or the equivalents thereof inmore remote ,apartments of the building, and by reason of the closeassociation of the heating coil with the bed of fire, together with theupwardly tapered construction of the coil and more particularly thegradual expansion of the tube forming the coil'froni its lower towardits upper end, an economical utilization of the heat units produced inthe fire. box is effected and a relatively rapid circulation of thewater in the system of which the coil forms a part is secured.

Having described the invention, what is claimed as new and useful is Aheater having a circulating coil of volute form wherein the convolutionsare of gradually reduced diameter from the base toward the upper end andof which the tubing is of gradually expanded diameter from its lowerinlet toward its upper outlet end.

In testimony whereof he has afiixed his signature.

FRED F. REISER.

